Reading Time: 3 minutesGRUB2 (GRand Unified Bootloader version 2) is the default boot loader on most Linux flavors. It resides in the Master Boot Record (BIOS systems) or the UEFI System Partition (UEFI systems) and is responsible for: How does GRUB2 work? Basically, we can pop up some GRUB2 stages: Stage 1: Installed in the MBR or EFI…
Reading Time: 12 minutesThis article explains what shell scripting is and provides some examples of usage. We’re using Red Hat Enterprise Linux, but all commands work in any Linux flavor. First and foremost: What is Shell Scripting? In Linux, a shell script is simply a text file containing commands you would normally type in the terminal, but saved…
Reading Time: 4 minutesUsing “tar” on RHEL 8 shows how to use the “tar” command to perform backups and archives, with or without compression, and provides a lot of examples of usage. All the practical examples are shown using Red Hat Enterprise Linux; however, they work on any Linux flavor. First and foremost: What is “tar”? The command…
Reading Time: 4 minutesModule Streams are part of the Application Streams feature in RHEL. They allow multiple versions of software to be available and managed independently. Key Concepts: This system lets you install and manage different versions of software without conflicts. 1- List all available modules: 2- Filtering by a specific module: or As we can see, the…
Reading Time: 3 minutesHow to Configure a Local Repository on RHEL 8 shows an alternative to using local repositories instead of using Internet repositories provided by the Red Hat Network. We’ve written an article explaining how to create an HTTP server to use as a network install server for RHEL. We’ll need this HTTP server to create a…
Reading Time: 4 minutesWhen you need to automate tasks on Red Hat Enterprise Linux, you have two go-to tools: The “at” command at queues single-run jobs to be executed once, at a specified future time. Key Concepts: Common Subcommands Schedule a command or script: Interactive scheduling: List pending jobs: Remove a job by its ID: Time Specifications You…